Apple today released a new version of iTunes, iTunes 12.5.1, which is available for OS X El Capitan and macOS Sierra users. iTunes 12.5.1 introduces a new Apple Music design, bringing Apple Music on the desktop in line with Apple Music on mobile devices just ahead of the release of iOS 10The update also brings macOS Sierra-specific features including support for Siri, allowing users to ask Siri to play songs on machines running macOS Sierra, and it includes support for Picture-in-Picture, another new Sierra feature.iTunes 12.5.1 can be downloaded immediately from the Software Update mechanism in the Mac App Store